delete columns pandas

1df.drop(['column_1', 'Column_2'], axis = 1, inplace = True) 

1#To delete the column without having to reassign df
2df.drop('column_name', axis=1, inplace=True) 

1df.drop(columns=['B', 'C'])

1df.drop('column_name', axis=1, inplace=True)

1df = df.drop(df.columns[[0, 1, 3]], axis=1)  # df.columns is zero-based pd.Index 
2df.drop(['column_nameA', 'column_nameB'], axis=1, inplace=True)

1df = df.drop(df.columns[[0, 1, 3]], axis=1)